cherry, you need to know that MBD is not something that comes on in a week or even a month, it takes months to become something serious. Chameleons are great at hiding problems and frankly, people often mistake symptoms of MBD for "normal".
It was just a coincidence that things got so bad when you had control. Frankly, as you showed a lot of initiative in finding this forum, asking for help and getting the chameleon to a vet, if it survives, it will be because of the time you had it in your care.